Electronically-Switched Directional Antennas for Wireless Sensor Networks: A Full-Stack Evaluation
The authors study the benefits of Electronically-Switched Directional (ESD) antennas in Wireless Sensor Networks (WSNs). ESD antennas have proved beneficial in cellular and ad-hoc networks, by increasing the communication range and by alleviating contention in directions other than the destination. The advantages in WSNs are, however, still largely to be quantified. Unlike existing works in this field, they start by characterizing a real-world antenna prototype, and apply this to an existing WSN stack, which they adapt with minimal changes. Their results show that: the combination of a low-cost ESD antenna and a mainstream WSN stack already brings significant performance improvements, e.g. nearly halving the radio-on time per delivered packet.